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4 years ago
//! AES errors
use std::{
io,
fmt,
error,
};
use openssl::{
error::ErrorStack,
};
#[derive(Debug)]
pub enum Error
{
Encrypt,
Decrypt,
Internal(ErrorStack),
IO(io::Error),
Random,
Length{expected: Option<usize>, got: Option<usize>},
Unknown,
}
impl error::Error for Error
{
fn source(&self) -> Option<&(dyn error::Error+'static)>
{
match &self {
Error::Internal(stack) => Some(stack),
Error::IO(io) => Some(io),
_ => None,
}
}
}
impl fmt::Display for Error
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "aes error: ")?;
match self
{
Error::Random => write!(f, "rng failure"),
Error::IO(io) => write!(f, "io: {}", io),
Error::Encrypt => write!(f, "encryption failed"),
Error::Decrypt => write!(f, "decryption failed"),
Error::Internal(ssl) => write!(f, "internal: {}", ssl),
Error::Length{expected: Some(expected), got: Some(got)} => write!(f, "bad length: expected {}, got {}", expected, got),
Error::Length{expected: Some(expected), ..} => write!(f, "bad length: expected {}", expected),
Error::Length{got: Some(got), ..} => write!(f, "bad length: got {}", got),
_ => write!(f, "unknown"),
}
}
}
impl From<ErrorStack> for Error
{
fn from(ssl: ErrorStack) -> Self
{
Self::Internal(ssl)
}
}
impl From<getrandom::Error> for Error
{
#[inline] fn from(_: getrandom::Error) -> Self
{
Self::Random
}
}
impl From<io::Error> for Error
{
fn from(i: io::Error) -> Self
{
Self::IO(i)
}
}